VrActivityDuplicateException Class

Thrown when a second Spatial SDK Activity attempts to register in a process that already has a live one. Public so callers (e.g. host apps) can catch by type and gracefully fall back instead of pattern-matching the exception message.

Extends IllegalStateException for backward compatibility with existing callers.

class VrActivityDuplicateException(message: String) : IllegalStateException

constructor(message: String)